1.
Combine the potatoes, onions, scallions, and parsley with the 1/2 cup French dressing.
2.
Line a large platter with the big outside leaves of the head of lettuce and pile the potato salad mixture in the center.
3.
Tear up the rest of the head of lettuce and scatter it around the platter outside the potato salad.
4.
Sprinkle the cress over the whole platter.
5.
Arrange the tomato wedges around the outside of the platter, with cucumber fingers between.
6.
Lay the avocado slices inside the tomato ring.
7.
Scatter the cheese over the entire platter and lay the green pepper rings on top.
8.
Next to the potato salad, on the inside, arrange beet slices or little bundles of julienned beets.
9.
Scatter the olives all over.
10.
Drizzle the platter with French dressing and scatter oregano over.